Analysis Day 2018JUL16
From Hall A Wiki
Contents
Agenda
- Welcome -- 9:00am
Session: Calibrations
- BCM Calibration-- Mike
- Raster Calibration -- Tyler H.
- Calibration Run Lists -- Jason
- Endcap Subtraction -- Tong
- Pedestal Stability-- Jason. prl2 pmt10
- Data Quality Checks -- Mike
Session: Systematic Effects
- December Boiling-- Tong
- March Boiling -- Mike
- Multi-track and No-track events -- Hanjie
- 3H Decay -- Tyler K
- Radiative Corrections -- Hanjie
- Positrons (slides) -- Tong
Session: Tools
- Event Viewer -- Tyler K
- Batch Replays -- Tyler H
Session: Wrap-up
- Priorities and Timeline Redmine Task List -- Evan
Minutes
SESSION: Calibrations
- Mike- BCM Calibrations-
- use dnew in standard analysis
- use constant calibration for entire MARATHON run
- Javier- why is unew low for calibration #2?
- Tyler H- Raster Calibration-
- Javier- Did something in the beamline really change? ask the expert
- Javier- Does the carbon hole image get fuzzier with higher angle due to multiple scattering within the target?
- Need to make a plot for stability of current-to-mm calibration over the whole MARATHON run
- check BPM documents to find raster calibration stuff
- Jason- Runlists-
- get runlist info in mysql, add mysql runlist query functions to TriTools
- Tong- Endcap Contamination-
- downstream vertex-z moving: caused by mispointing, raster calibration, optics?
- Jason- Pedestal Stability-
- Hanjie- FADC class for S0, S2, and Cer calculates pedestal values event-by-event
- Mike- Data Quality Checks-
SESSION: Systematics
- Tong- December Boiling-
- Talk to Meekins: are we surprised that the boiling is non-linear?
- check target-z dependence of boiling
- Mike- Boiling-
- why are the events from the gas tilted (high at upstream, lower at downstream)
- Hanjie- No-track/Multi-track-
- use assumption of constant cosmic rate, predict zero track efficiency effect vs kinematic
- Tyler K- Tritium Decay-
- calculate effect of uncertainty in contamination factor on uncertainty in yield ratio
- Hanjie- Radiative Corrections-
- Check that you are actually using scattering angle, not just horizontal angle, for the radiative corrections
- Zhihong: bin centering- use simulation with radiative correction included
- Javier: bin centering- cut to stay away from edges, use model to get dependence of cross-section on x, Q^2
- Makis: don't trust edge bins in x, plot each bite separately to look for discrepancies
- Zhihong: perhaps make tighter acceptance cuts on theta and phi
- check which model used in Dave Gaskells code
- Tong- Positrons-
- do data quality checks on Helium kin3 positron runs
SESSION 3
- Tyler K- Event Viewer-
- Tyler H- Batch Replays-
- clean up old replay directories, if any still exist
SESSION 4
- Evan- Discussion: Moving Forward-
- Priority 1:
- Anything that changes the database/code for pass2
- finalize calibrations (BCM, raster, beam energy, optics, etc.)
- Anything that changes the database/code for pass2
- energy and angle higher-order corrections
- optics matrix depends on accurate angle central value and mispointing numbers
- decision on beam trip cut handling (cutting out ramp-up?)
- Finalize Data Quality Checks
- run lists
- all suspicious runs identified and investigated
- Priority 2:
- Systematics Studies
- radiative corrections
- tritium decay
- positrons
- endcap contamination
- boiling
- acceptance cuts
- zero-track and multi-track events (decision: use only one-track events)
- priority ordering (Makis)-
- acceptance cuts (need to set standard cuts (PID: Hanjie track study))
- endcaps
- boiling
- positrons
- tritium decay
- binning
- radiative corrections
- Systematics Studies
- Priority 1: